Storage battery tester



Aug. 18, 1931. w. z. BUERGER STORAGE BATTERY TESTER 2 Shoots-Shut 1 Filed Sept. 20. 1928- Inventor v wzzerz Zuer f Aug. 18, 1931.

W. Z. BUERGER STORAGE BATTERY TESTER Filed Sept. 20. 1928 2 Sheds-Sheet 2 1 7 ,2 Inventor ZJaZZcrZ Z uevyer mliwm This invention relates to i vice which is adapted to be the instrument board or- 'otlie'rvcofiemmt place in an automobile, track, were other motor vehicle, the I structed to facilitate Elia of the storage battery and My principal aim is ftu pmvi'de a 1m and inexpensive instrument embed ng an ammeter or other electrical indi disposed in plain view of the operator, onin- 5 I v dicating the true conditionof theiglmttery e er g renee character cells, and spark plugs. z eonvenfiiobpl storage My principal aim, however, is toprovide sieeinj r, 1e and 19 .;i-es eve 1. 3A a positive and dependable testi strnsc "s ment of this class, whichv-will pp cc "of'the operator to determine theconditlg cell of the battery in a, manner'toa the trouble and expense endless having a battery and tested in a public automobile T similar establishment.

A further object of inventi provide an indicator of this simple and plain tothej average dn whereby he may positivel f condition of variouscel'ls order that the defect may 1 f paired before it becomesiuinous] i Another object is to provide" w f of this class which is exd tier: p in performance, economic: ,3 rant! pact and convenientantl I tion as to fulfill the va de? vice of this class, in awd epeiidob flji Other objects and more readily apparent from the f description and drawings. 1 In the drawings: Figure 1 is a plan'view of $116, or testing instrument. Figure 2 is a section t, upon the plane of theline 0i V Figure 3 is also a section rakenm line 1 3-3 of Figure 1. lilo Figure 4 is a view showingthe a ram. r Y 11 order that a comprehe w ing of the arrangement may U obtained, attention is firstjinn 6- y itplemen fi element 1, i d it embodies ndividualldii [tudi awesomeness, if d r opposite to comma 8,9 and iii a versity 5 num ra s 0 a s seismic wi hje if'eh flfje t,

in we theg rema mn f r i n, l

Figures 1, 2 and 8. This comprises a suitably shaped box 38, having a. cover plate 39, of insulation material. The aforesaid contact elements are mounted on this cover plate on opposite sides of the longitudinal slot 40. The circuit closer 41 is movable in this slot. It embodies an insulation knob 42, mounted on a bolt 43, and the shank of the bolt passes through the slot and the head bridges the slot to provide a suitable sliding connection. Segmental contact plates at are carried by the bolts and are arranged as shown in dotted lines in Figure l to bridge the pairs of contacts included in the separate cell and ammeter circuits. For instance, one plate may bridge the contact-s 26 and 8 of the first group and the remaining plate bridges the contacts 27 and 13 of the same group, thus electrically connecting the first cell with both sides of the ammeter to act on the indicating pointer 45 in the ammeter. Thus there is a separate group of tour contacts for each cell of the battery, each group being divided into pairs of contacts separately connected with opposite sides of the ammeter.

It is to be noted that there is an upstanding socketed portion formed on the box closing plate 39, the sockets being designated by the numerals -16, and being constructed to accommodate spark plugs. Suitable spark plug testing means may be embodied in this instrument so that it may serve both as a battery and plug tester, the spark plug means being a separate and independent invention, however, and is neither disclosed or specifically described.

It is plainly evident from the description and drawings that the slidable circuit closer 41 is slid back and forth in the slot 40 to selectively close the desired group of contacts to permit the condition of each cell of the battery 16 to be individually determined. It is further through that persons familiar with inventions of this class will be able to obtain a clear understanding of the construction and advantages, after reading the description in connection with the drawings. Consequently a more lengthy description is regarded unnecessary.

Minor changes in the shape, size and rearrangement of parts coming within the field of invention claimed may be resorted to, if desired.

I claim:

In a multiple cell battery testing device of the character described, a switch comprising a plate of electricity insulating material having an elongated slot therein, spaced pairs of contacts arranged on opposite sides of the slot longitudinally therewith, a bolt operable in the slot and extending upwardly therefrom, a knob of electricity insulating material mounted on the bolt for travel over the contacts, and a pair of parallel contact VALTER Z. BUERGER. 

